There are quite a few significant changes between versions, and quite a few items to consider before performing the upgrade.
A good place to start would be the version release notes. However, just to give you an idea of what to consider:
- Are there iRules in place? These may need to be updated to work in 11.4.1, and may prevent a successful configuration import after upgrade.
- What Modules are you using and do they still exist in 11.4.1? ACA is no longer supported, but functionality was rolled into APM and no longer requires the extensive iRules.
- Are you in an Active-Standby configuration? There have been siginificant changes to device pairs.
- Do you have any custom scripts? Backup, logs, etc, these may no longer work.
- Have you reviewed the bigpipe to tmsh command mappings? bigpipe has been deprecated in 11.x. https://devcentral.f5.com/wiki/tmsh.bigpipemappings.ashx
11.4.1 Release notes: http://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/product/relnote-ltm-11-4-1.htmlrn_install_checklist
Hope that helps.
Nimbostratus
